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- Habit Reversal 0 total
- Hair Loss 13 total
- Hair Removal 1 total
- Hand Dermatitis 9 total
- Head and Neck Cancer 81 total
- Head Lice 0 total
- Headaches 36 total
- Healthy Volunteers (Meningococcal Infection 4 total
- Healthy11 0 total
- Hearing Aid 0 total
- Hearing Impairment 14 total
- Hearing Loss 13 total
- Heart Attack (Myocardial Infarction) 12 total
- Heart Defect 12 total
- Heart Disease 212 total
- Heart Failure 89 total
- Heart Transplantation 7 total
- Heart Valve Disease 34 total
- Heartburn 5 total
- Heartburn (Pediatric) 0 total
- Helicobacter Pylori 4 total
- Hemangioma 3 total
- Hematologic Cancer 32 total
- Hematologic Neoplasms 32 total
- Hematological Disorders 142 total
- Hemifacial Spasm 0 total
- Hemodialysis 32 total
- Hemoglobinuria, Paroxysmal 0 total
- Hemophilia 8 total
- Hemorrhage 130 total
- Hemorrhoids 2 total
- Hepatic Encephalopathy 6 total
- Hepatitis 81 total
- Hepatitis B 26 total
- Hepatitis C; Chronic 1 total
- Hepatoblastoma 3 total
- Hereditary Angioedema 0 total
- Hereditary Cancer Syndromes 12 total
- Hernia 21 total
- Herpes Simplex Infections 1 total
- Herpes Zoster Infections 0 total
- Herpetic Neuralgia 0 total
- High Blood Pressure (Hypertension - Pediatric) 0 total
- High Blood Pressure (Hypertension) 3 total
- High Cholesterol (Hyperlipidemia) 0 total
- Hip Replacement 7 total
- Histiocytoma 1 total
- HIV 44 total
- HIV (Pediatric) 0 total
- HIV Infections 44 total
- HIV/AIDS 7 total
- Hives (Urticaria) 0 total
- Hodgkin's Disease 37 total
- Holoprosencephaly 0 total
- Hormone Deficiencies 1 total
- Hormone Replacement Therapy 36 total
- Hot Flash 2 total
- Human Growth Hormone (HGH) 7 total
- Human Papilloma Virus (HPV) 6 total
- Humeral Fractures 2 total
- Hunter Syndrome (MPS II) 1 total
- Huntington's Disease 15 total
- Hyperargininemia 0 total
- Hypercalcemia 3 total
- Hyperparathyroidism 2 total
- Hyperparathyroidism (Pediatric) 0 total
- Hypertriglyceridemia 3 total
- Hypochondriasis 0 total
- Hypogammaglobulinemia 2 total
- Hypogonadism 4 total
- Hyponatremia 1 total
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